Several years ago, our friends introduced us to Royal Burgundy Bush Beans - of course they called them "Magic Beans". Our friends sent us home with a handful of magic beans telling us to watch carefully as we cooked them. We admired their purple colour and were eager to discover their magic.
We, (oops - I mean the kids of course) were thrilled to see the colour change right before our eyes. How cool is that! For an explanation of the science behind the colour change check out this link http://www.ajchomefinder.com/gardening/why-are-my-beans-135810.html
We've been hooked on royal burgundy beans ever since.